Spiral anchor combined type high-uplift steel concrete precast pile

Abstract

The utility model relates to a screw anchor combined type high-uplift steel concrete precast pile which comprises a pile body and a screw anchor, a pouring channel for pouring concrete is formed in an inner cavity of the pile body, an upper lengthening ring is fixedly connected to the upper end of the pile body, a flange plate is fixedly connected to the top of the upper lengthening ring, and a lower lengthening ring is fixedly connected to the lower end of the pile body. The bottom of the lower lengthening ring is fixedly connected with a reinforcing ring plate; the spiral anchor comprises an anchor rod and spiral anchor discs, the upper end of the anchor rod is located in the pouring channel, the lower end of the anchor rod extends downwards to the position below the pile body, and the multiple spiral anchor discs are distributed on the outer wall, located below the pile body, of the anchor rod. The pile body and the spiral anchor form a whole in a post-pouring concrete mode, the lower portion of the pile body is screwed into a deeper soil layer through the spiral anchor, the length of the pile body is shortened, meanwhile, the uplift resistance of the pile body and the soil is enhanced, an existing traditional operation mode of excavation, hole screwing and formwork erecting operation on site is replaced, construction is more convenient, and the construction efficiency is improved. On-site pollution is reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of prefabricated steel concrete pile construction, in particular to a spiral anchor combined high-tension-resistant steel concrete prefabricated pile. Background Art

[0002] With the rapid development of power lines, new energy power lines and the communications industry in recent years, the number of transmission line towers, single-tube towers and signal tower base stations has increased, and their foundations are mostly cast-in-place foundations, such as excavated step foundations and cast-in-place pile foundations, which require on-site excavation, drilling, and formwork operations, which take a long time to construct, cause large pollution on site, and are inefficient. In addition, due to the high voltage level of some lines, the load requirements for poles and towers are also higher, and the required foundation size and depth are larger, so the excavation needs to be larger and deeper to ensure that the poles and towers meet the load requirements. Therefore, the construction difficulty will be further increased, the amount of materials required will increase significantly, and the construction time will be longer. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the utility model provides a screw anchor combined high pull-out resistance prefabricated pile that is prefabricated in a factory and can replace the existing cast-in-place step foundation or cast-in-place pile foundation, greatly shortening the construction period, reducing on-site pollution, and improving construction efficiency. It solves the construction difficulty problem caused by the large depth of pile driving and drilling due to the complexity of geological survey.

[0004] The utility model is realized through the following technical scheme: a spiral anchor combined high-tension steel concrete prefabricated pile, comprising a pile body and a spiral anchor, the inner cavity of the pile body forms a pouring channel for pouring concrete, the upper end of the pile body is fixedly connected with an upper extension ring, the top of the upper extension ring is fixedly connected with a flange plate, the lower end of the pile body is fixedly connected with a lower extension ring, and the bottom of the lower extension ring is fixedly connected with a reinforcing ring plate; the spiral anchor comprises an anchor rod and a spiral anchor plate, the upper end of the anchor rod is located in the pouring channel, the lower end of the anchor rod extends downward to below the pile body, and a plurality of spiral anchor plates are distributed on the outer wall of the anchor rod below the pile body.

[0005] The pile body of this scheme is prefabricated in the factory and directly driven into the ground for use during construction, which reduces on-site pollution and improves construction efficiency. The pile body increases the friction with the soil around the pile, so that the prefabricated pile has good pull-out resistance. The lower end of the anchor rod extends below the pile body into a deeper soil layer, shortening the length of the pile body and reducing the project cost. The spiral anchor plate on the outer wall of the anchor rod facilitates the downward screwing of the anchor rod, while increasing the connection strength with the soil layer, thereby further enhancing the upper pull-out resistance of the pile body. The upper and lower extension rings are used to increase the structural strength of the upper and lower ends of the pile body. The upper extension ring is provided with a flange plate for easy connection with the tower body on the ground, and the reinforcing ring plate enhances the structural strength of the lower extension ring. The anchor rod and the pile body are post-cast and fixed. After the anchor rod is screwed to the calculated depth, concrete is poured to form an integrated structure with the pile body, which is convenient for construction.

[0006] As an optimization, the pile body is embedded with reinforcing ribs extending along the length of the pile body, and the two ends of the reinforcing ribs are respectively fixedly connected to the upper extension ring and the lower extension ring. In this optimization solution, the reinforcing ribs enhance the structural strength of the pile body, and the pile body is fixedly connected to the upper extension ring and the lower extension ring through the reinforcing ribs.

[0007] As an optimization, the reinforcement bars include prestressed bars and non-prestressed bars, and both prestressed bars and non-prestressed bars are evenly distributed along the circumference of the pile body. In this optimization scheme, the prestressed bars can balance the pile body load, improve the crack resistance of the pile body, and reduce deflection, while the non-prestressed bars can increase the ultimate bearing capacity of the pile body and improve the ductility during failure.

[0008] As an optimization, the outer wall of the pile body is fixed with a plurality of anti-pullout angle steels, and the plurality of anti-pullout angle steels are evenly distributed along the circumference and length direction of the pile body. This optimization scheme further enhances the connection strength between the pile body and the soil around the pile, further improves the anti-pullout performance of the steel concrete pile, and can also prevent the pile body from rotating during piling, making it easier for the pile body to be driven into the ground.

[0009] As an optimization, the anti-pullout angle steel is fixedly connected to the pile body by bolts, and the outer wall of the pile body is provided with embedded nuts for the anti-pullout angle steel to be screwed. This optimization scheme facilitates the subsequent installation of the anti-pullout angle steel.

[0010] As an optimization, the upper end of the anchor rod is fixedly connected with a fixed disc, and a plurality of reserved holes are evenly distributed along the circumference of the fixed disc. This optimization scheme facilitates the connection between the anchor rod and the screw-in drilling machine through the fixed disc, and the fixed disc can enhance the connection strength between the spiral anchor and the pile body after pouring concrete.

[0011] As an optimization, the inner diameter of the reinforcing ring plate is smaller than the outer diameter of the fixed disc and larger than the outer diameter of the spiral anchor disc. In this optimization scheme, the inner diameter of the reinforcing ring plate is larger than the outer diameter of the spiral anchor disc, so that the spiral anchor disc can pass through the reinforcing ring plate and screw into the deep soil layer. The inner diameter of the reinforcing ring plate is smaller than the outer diameter of the fixed disc, which limits the fixed disc and prevents the spiral anchor from screwing down too much and causing the fixed disc and the casting channel to separate.

[0012] As an optimization, the anchor rod is hollow, and a grouting hole connected to the anchor rod cavity is provided on the fixed disc. The concrete poured in the pouring channel of this optimization solution can enter the inner cavity of the anchor rod, further enhancing the integral connection strength between the anchor rod and the pile body.

[0013] As an optimization, a plurality of reinforcing ribs are fixedly connected to the outer wall of the upper extension ring, and the plurality of reinforcing ribs are evenly distributed along the circumference and fixedly connected to the flange plate. This optimization scheme supports the flange plate by reinforcing the ribs to improve the structural strength of the flange plate.

[0014] The beneficial effects of the utility model are as follows: the pile body and the spiral anchor of the utility model are formed into a whole by post-cast concrete, and the spiral anchor is screwed into a deeper soil layer under the pile body, which shortens the length of the pile body while enhancing the upper pull-out resistance of the soil. During construction, the pile body is first driven into the ground, and then the spiral anchor is screwed into the calculated depth to cast concrete, which replaces the existing traditional operation mode of excavation, drilling and formwork operations on site. The construction is more convenient, and the construction difficulty caused by complex geological surveys and large drilling depths is solved, on-site pollution is reduced, and construction efficiency is improved.

[0015] The utility model has anti-pullout angle steel distributed on the outer wall of the pile body to further improve the anti-pullout property of the steel concrete pile, and the pile body is embedded with reinforcing ribs to connect the upper extension ring and the lower extension ring to improve the structural strength of the pile body, and the flange plate on the upper extension ring is convenient for connection with the tower body on the ground, and the spiral anchor is convenient for connection and screwing into the drilling machine through the fixed disc, which is easy to use, and at the same time, the connection strength between the spiral anchor and the pile body after pouring concrete is enhanced by the fixed disc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a cross-sectional view of the structure of the utility model;

[0017] Figure 2 for Figure 1 A magnified view of part A;

[0018] Figure 3 for Figure 1 A magnified view of part B;

[0019] Figure 4 This is a top view of the pile body;

[0020] Figure 5 It is the top view of the helical anchor;

[0021] As shown in the figure:

[0022] 1. Pile body, 2. Screw anchor, 3. Concrete, 4. Pull-out angle steel, 5. Embedded nut, 6. Reinforcement plate, 7. Upper extension ring, 8. Lower extension ring, 9. Reinforcement ring plate, 10. Flange plate, 11. Reinforcement ribs, 111. Prestressed tendons, 112. Non-prestressed tendons, 12. Embedded nut, 21. Anchor rod, 22. Screw anchor plate, 23. Fixed disc, 24. Grouting hole, 25. Reserved hole. DETAILED DESCRIPTION

[0023] In order to clearly illustrate the technical features of this solution, this solution is described below through a specific implementation method.

[0024] like Figures 1 to 5As shown, a spiral anchor combined high-tension steel concrete precast pile includes a pile body 1 and a spiral anchor 2, and the inner cavity of the pile body 1 forms a pouring channel for pouring concrete. The pile body 1 described in this embodiment is a hollow steel concrete pile prefabricated and formed in a factory using a centrifugal process, and the hollow inner cavity of the steel concrete pile forms the pouring channel. The pile body 1 is embedded with reinforcing ribs 11 extending along the length direction of the pile body 1, and the reinforcing ribs 11 include a plurality of prestressed ribs 111 and a plurality of non-prestressed ribs 112, and the plurality of prestressed ribs and the plurality of non-prestressed ribs are evenly distributed along the circumference of the pile body.

[0025] The outer wall of the pile body 1 is fixed with a plurality of pull-out angle steels 4, and the plurality of pull-out angle steels 4 are evenly distributed along the circumference and length of the pile body. The pull-out angle steels 4 are fixedly connected to the pile body 1 with bolts, and the outer wall of the pile body 1 is provided with embedded nuts 5 for screwing the pull-out angle steels. The pull-out angle steels 4 of this embodiment are convenient for the pile body 1 to be driven into the ground, and can also increase the upper pull-out resistance of the pile body. The embedded nuts 5 are embedded in the pile body when the pile body 1 is prefabricated in the factory, and two embedded nuts 5 are in a group. Two bolt holes are provided on the pull-out angle steel 4, and the pull-out angle steel 4 can be installed on site by screwing it with two bolts and a corresponding group of embedded nuts 5 on the pile body, so as to ensure that the pull-out angle steel and the pile body are firmly connected. Figure 1 , 4 As shown, in this embodiment, six anti-pullout angle steels 4 are evenly distributed on the outer wall of the pile body 1 in the circumferential direction, and the six anti-pullout angle steels form a group. The outer wall of the pile body has three groups of the anti-pullout angle steels evenly distributed along the length direction.

[0026] The upper end of the pile body 1 is fixedly connected with an upper extension ring 7, and the lower end of the pile body 1 is fixedly connected with a lower extension ring 8. The upper extension ring 7 and the lower extension ring 8 are both steel rings, and the upper and lower ends of the reinforcing ribs 11 are respectively welded and fixed to the upper extension ring 7 and the lower extension ring 8. The pile body 1, the embedded nut 5, the upper extension ring 7 and the lower extension ring 8 of this embodiment are prefabricated in the factory to form an integrated structure, which can be directly used during construction to improve construction efficiency.

[0027] The spiral anchor 2 includes an anchor rod 21 and a spiral anchor plate 22. The upper end of the anchor rod 21 is located in the casting channel, and the lower end of the anchor rod 21 extends downward to below the pile body 1. A plurality of spiral anchor plates 22 are distributed on the outer wall of the anchor rod 21 below the pile body 1. The plurality of spiral anchor plates 22 are evenly distributed along the length direction of the anchor rod. The spiral anchor plates 22 are welded and fixed on the outer wall of the anchor rod 21.

[0028] The anchor rod 21 is hollow, and a fixed disc 23 is fixedly connected to the upper end of the anchor rod 21. A grouting hole 24 is provided on the fixed disc 23 and communicates with the cavity of the anchor rod 21. In this embodiment, the outer diameter of the fixed disc 23 is smaller than the inner diameter of the pile body 1 and larger than the outer diameter of the spiral anchor disc 22. The anchor rod 21 is welded and fixed at the center of the fixed disc 23. A plurality of reinforcing ribs 6 are welded and fixed to the outer wall of the anchor rod 21 in a circumferentially distributed manner. The upper end of the reinforcing ribs 6 is welded and fixed to the bottom of the fixed disc 23 to enhance the structural strength of the fixed disc.

[0029] like Figure 5 As shown, a plurality of reserved holes 25 are evenly distributed along the circumference of the fixed disc 23, and the number of the reserved holes 25 is at least four. In this embodiment, eight reserved holes 25 are evenly distributed on the fixed disc 23, and the fixed disc 23 is connected to the connecting assembly of the screw-in drilling rig through the reserved holes 25. The screw-in drilling rig drives the spiral anchor to rotate into a deeper soil layer, which is convenient for construction. The screw-in drilling rig is a prior art and will not be described in detail here. The anchor rod 21, the spiral anchor plate 22, and the fixed disc 23 described in this embodiment are also prefabricated in the factory to form an integrated body, which can be directly used during construction, further improving construction efficiency.

[0030] A reinforcing ring plate 9 is welded and fixed to the bottom of the inner wall of the lower extension ring 8, and the inner diameter of the reinforcing ring plate 9 is smaller than the outer diameter of the fixed disc 23 and larger than the outer diameter of the spiral anchor disc 22. The reinforcing ring plate 9 can be welded on site or prefabricated in a factory to further improve construction efficiency.

[0031] A flange plate 10 is fixedly connected to the top of the upper extension ring 7 . The outer diameter of the flange plate 10 is larger than that of the upper extension ring 7 . Bolt holes for screwing to the bottom plate of the tower body are provided on the flange plate 10 .

[0032] A plurality of reinforcing ribs 6 are also fixedly connected to the outer wall of the upper extension ring 7, and the plurality of reinforcing ribs 6 are evenly distributed along the circumferential direction and fixedly connected to the flange plate 10. The side walls of the reinforcing ribs 6 on the outer wall of the upper extension ring 7 in this embodiment are welded and fixed to the outer wall of the upper extension ring 7, and after pouring concrete in the pouring cavity of the pile body, the flange plate 10 is welded and fixed to the top of the upper extension ring 7, and the upper end of the reinforcing ribs 6 is welded to the flange plate 10 to further support and fix the flange plate, thereby improving the structural strength of the flange plate.

[0033] Working principle: The pile body 1 is driven into the underground pile hole by a pile driver, and the fixed plate 23 at the upper end of the anchor rod 21 is connected to the connecting assembly of the screw-in drill. The screw-in drill drives the anchor rod 21 to penetrate into the casting channel of the pile body 1, and drives the spiral anchor 2 to pass through the inner hole of the reinforcing ring plate 9 and screw into the deep soil layer. After the spiral anchor 2 is screwed into the calculated depth, the connecting assembly and the spiral anchor 2 are separated, and concrete is poured into the casting channel so that the pile body 1 and the spiral anchor 2 are cast as one. Finally, the flange plate 10 is welded and fixed to the top of the upper extension ring 7, and the reinforcing rib plate 6 and the flange plate 10 are welded to further support the flange plate.

[0034] Of course, the above description is not limited to the above examples. The technical features not described in the present invention can be achieved by or by adopting the existing technology, which will not be repeated here. The above embodiments and drawings are only used to illustrate the technical scheme of the present invention and are not limitations of the present invention. The present invention is described in detail with reference to the preferred implementation methods. Ordinary technicians in this field should understand that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the present invention do not deviate from the purpose of the present invention and should also fall within the scope of protection of the claims of the present invention.

Claims

1. A spiral anchor combined high-tension steel concrete prefabricated pile, comprising a pile body (1) and a spiral anchor (2), characterized in that: The inner cavity of the pile body (1) forms a pouring channel for pouring concrete, the upper end of the pile body (1) is fixedly connected to an upper extension ring (7), the top of the upper extension ring is fixedly connected to a flange plate (10), the lower end of the pile body (1) is fixedly connected to a lower extension ring (8), and the bottom of the lower extension ring is fixedly connected to a reinforcing ring plate (9); The spiral anchor (2) comprises an anchor rod (21) and a spiral anchor plate (22), wherein the upper end of the anchor rod is located in the casting channel, the lower end of the anchor rod (21) extends downward to below the pile body (1), and a plurality of spiral anchor plates (22) are distributed on the outer wall of the anchor rod (21) below the pile body.

2. The spiral anchor combined high-tension steel concrete precast pile according to claim 1, characterized in that: The pile body (1) is embedded with reinforcing ribs (11) extending along the length direction of the pile body, and the two ends of the reinforcing ribs are respectively fixedly connected to the upper extension ring (7) and the lower extension ring (8).

3. The spiral anchor combined high-tension steel concrete precast pile according to claim 2, characterized in that: The reinforcing ribs (11) include prestressed ribs (111) and non-prestressed ribs (112), and the prestressed ribs and the non-prestressed ribs are evenly distributed along the circumference of the pile body.

4. The spiral anchor combined high-tension steel concrete precast pile according to claim 2, characterized in that: The outer wall of the pile body (1) is fixedly provided with a plurality of anti-pullout angle steels (4), and the plurality of anti-pullout angle steels are evenly distributed along the circumference and length direction of the pile body.

5. The spiral anchor combined high-tension steel concrete precast pile according to claim 4, characterized in that: The anti-pullout angle steel (4) is connected to the pile body by bolts, and an embedded nut (5) for screwing the anti-pullout angle steel is provided on the outer wall of the pile body (1).

6. The spiral anchor combined high-tension steel concrete precast pile according to claim 1, characterized in that: The upper end of the anchor rod (21) is fixedly connected to a fixed disc (23), and the fixed disc has a plurality of reserved holes (25) evenly distributed along the circumference.

7. The spiral anchor combined high-tension steel concrete precast pile according to claim 6, characterized in that: The inner diameter of the reinforcing ring plate (9) is smaller than the outer diameter of the fixed disc (23) and larger than the outer diameter of the spiral anchor disc (22).

8. The spiral anchor combined high-tension steel concrete precast pile according to claim 6, characterized in that: The anchor rod (21) is hollow, and the fixed disc (23) is provided with a grouting hole (24) that is in communication with the anchor rod cavity.

9. The spiral anchor combined high-tension steel concrete precast pile according to claim 1, characterized in that: A plurality of reinforcing rib plates (6) are fixedly connected to the outer wall of the upper extension ring (7), and the plurality of reinforcing rib plates are evenly distributed along the circumferential direction and fixedly connected to the flange plate (10).

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